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What happens when KMnO4 is heated ?...

What happens when `KMnO_4` is heated ?

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It changes into `K_(2)MnO_(4),MnO_(2) and O_(2)`
`underset("Dark pink")(2KMnO_4) overset(Delta)rarr underset("Green")(K_2MnO_4) + MnO_2 + O_2`
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ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Arrange the following in increasing order of basic character: MnO, ...

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  2. Arrange the following in increasing order of acidic character: CrO,...

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  3. What happens when KMnO4 is heated ?

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  4. What is Baeyer's reagent ?

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  5. Why is KMnO4 kept in dark bottles ?

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  6. Why is HCl not used to acidify a permanganate solution in volumetric e...

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  7. Why is K(2)Cr(2)O7 generally preferred over Na(2)Cr(2)O(7) , in volume...

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  8. What happens when chromates are kept in acidic solution and dichromate...

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  9. In permanganate ion, all the bonds formed between Mn and oxygen are co...

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  10. Why lanthanoids and actinoids are called f-block elements?

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  11. What is the maximum oxidation state in actinoids?

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  12. State the common characteristic of lanthanoids and actanoids which pla...

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  13. Give the general electronic configuration of actinoids

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  14. The size of the trivalent cations in the lanthanoid series decreases s...

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  15. Out of the following identify (i) the *d' block element (ii) the of bl...

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  16. State a consequence of lanthanoid contraction shown by transition elem...

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  17. Write outer electronic configuration of lanthanoids.

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  18. Which trivalent cation is largest in lanthanoid series ?

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  19. Write any two uses of pyrophoric alloys.

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  20. Write are non-stoichimetric oxides ? Give one example.

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